Two dozen police officers were wounded Thursday, three of them seriously, as violence flared in protests across France against a hotly contested labour reforms bill. Security forces in Paris responded with teargas as masked youths threw bottles and cobblestones, leaving three policemen with serious injuries, Interior Minister Bernard Cazeneuve said, adding that 24 police were injured overall. Clashes between police and protesters also erupted in the cities of Nantes, Lyon, Marseille and Toulouse, with 124 people arrested nationwide, Cazeneuve said in Lyon.